FST

FST may refer to:

Arts and entertainment

 * Finlands Svenska Television, now Yle Fem, the Swedish-language department of the Finnish Broadcasting Company
 * Florida Studio Theatre, in Sarasota, Florida, United States
 * Free Southern Theater, in Mississippi, United States

Biology

 * Fixation index (FST), in population genetics
 * Follistatin, a mammalian glycoprotein (and gene)

Education

 * Franciscan School of Theology, in California, United States
 * French School of Thessaloniki, in Greece
 * The interdisciplinary field of food science and technology

Government and politics

 * Fermanagh and South Tyrone (Assembly constituency), in Northern Ireland
 * Fermanagh and South Tyrone (UK Parliament constituency), in Northern Ireland
 * Financial Secretary to the Treasury, of the United Kingdom
 * Foreign Sports Talent Scheme, of Singapore

Military

 * Fire Support Team of the Royal Artillery
 * Fleet Survey Team of the United States Navy
 * Forward surgical teams of the United States Army

Technology

 * Feature Selection Toolbox, machine learning software
 * File Streaming Technology, a digital audio format
 * Finite-state transducer
 * Full-Scale Tunnel, a demolished NASA wind tunnel

Transport

 * Fenchurch Street railway station, in London
 * First Stop Travel, a Scottish bus operator
 * Fort Stockton–Pecos County Airport, in Texas, United States
 * Sint-Truiden railway station, in Belgium

Other uses

 * Family Survival Trust, in the United Kingdom
 * Foundation for Science and Technology, in the United Kingdom
 * Field sobriety testing
 * Fiji Standard Time